<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="../react18/react.development.js"></script>
    <script src="../react18/react-dom.development.js"></script>
    <script src="../react18/babel.min.js"></script>
  </head>
  <body>
    <div id="app"></div>
    <script type="text/babel">
      function Header() {
        return (
          <header>
            <h1>一级标题</h1>
            <h2>二级标题</h2>
          </header>
        );
      }
      function Content() {
        return (
          <header>
            <p>我是内容</p>
            <p>我是内容</p>
          </header>
        );
      }
      function App(){
        return <div>
            <Header></Header>
            <Content></Content>
            </div>
      }
      ReactDOM.createRoot(document.getElementById("app")).render(< App />);
    </script>
  </body>
</html>
